2 * RichEdit - Caret and selection functions.
4 * Copyright 2004 by Krzysztof Foltman
5 * Copyright 2005 by Phil Krylov
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
27 void ME_SetCursorToStart(ME_TextEditor *editor, ME_Cursor *cursor)
29 cursor->pPara = editor->pBuffer->pFirst->member.para.next_para;
30 cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
34 static void ME_SetCursorToEnd(ME_TextEditor *editor, ME_Cursor *cursor)
36 cursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
37 cursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
42 int ME_GetSelectionOfs(ME_TextEditor *editor, int *from, int *to)
44 *from = ME_GetCursorOfs(&editor->pCursors[0]);
45 *to = ME_GetCursorOfs(&editor->pCursors[1]);
57 int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to)
59 if (ME_GetCursorOfs(&editor->pCursors[0]) < ME_GetCursorOfs(&editor->pCursors[1]))
61 *from = &editor->pCursors[0];
62 *to = &editor->pCursors[1];
65 *from = &editor->pCursors[1];
66 *to = &editor->pCursors[0];
71 int ME_GetTextLength(ME_TextEditor *editor)
74 ME_SetCursorToEnd(editor, &cursor);
75 return ME_GetCursorOfs(&cursor);
79 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how)
83 if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
85 if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
88 length = ME_GetTextLength(editor);
90 if ((editor->styleFlags & ES_MULTILINE)
91 && (how->flags & GTL_USECRLF)
92 && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
93 length += editor->nParagraphs - 1;
95 if (how->flags & GTL_NUMBYTES ||
96 (how->flags & GTL_PRECISE && /* GTL_PRECISE seems to imply GTL_NUMBYTES */
97 !(how->flags & GTL_NUMCHARS))) /* unless GTL_NUMCHARS is given */
101 if (how->codepage == 1200)
103 if (how->flags & GTL_PRECISE)
104 FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
105 if (GetCPInfo(how->codepage, &cpinfo))
106 return length * cpinfo.MaxCharSize;
107 ERR("Invalid codepage %u\n", how->codepage);
114 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
116 int selectionEnd = 0;
117 const int len = ME_GetTextLength(editor);
119 /* all negative values are effectively the same */
126 if (from == 0 && to == -1)
128 ME_SetCursorToStart(editor, &editor->pCursors[1]);
129 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
130 ME_InvalidateSelection(editor);
131 ME_ClearTempStyle(editor);
135 /* if both values are equal and also out of bound, that means to */
136 /* put the selection at the end of the text */
137 if ((from == to) && (to < 0 || to > len))
143 /* if from is negative and to is positive then selection is */
144 /* deselected and caret moved to end of the current selection */
148 ME_GetSelectionOfs(editor, &start, &end);
149 editor->pCursors[1] = editor->pCursors[0];
151 ME_ClearTempStyle(editor);
155 /* adjust to if it's a negative value */
159 /* flip from and to if they are reversed */
167 /* after fiddling with the values, we find from > len && to > len */
170 /* special case with to too big */
177 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
178 editor->pCursors[1] = editor->pCursors[0];
179 ME_InvalidateSelection(editor);
180 ME_ClearTempStyle(editor);
184 ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]);
185 editor->pCursors[0] = editor->pCursors[1];
186 ME_MoveCursorChars(editor, &editor->pCursors[0], to - from);
187 /* Selection is not allowed in the middle of an end paragraph run. */
188 if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA)
189 editor->pCursors[1].nOffset = 0;
190 if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA)
191 editor->pCursors[0].nOffset = 0;
197 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
198 int *x, int *y, int *height)
201 ME_DisplayItem *run = pCursor->pRun;
202 ME_DisplayItem *para = pCursor->pPara;
203 ME_DisplayItem *pSizeRun = run;
207 assert(height && x && y);
208 assert(~para->member.para.nFlags & MEPF_REWRAP);
209 assert(run && run->type == diRun);
210 assert(para && para->type == diParagraph);
212 row = ME_FindItemBack(run, diStartRowOrParagraph);
213 assert(row && row->type == diStartRow);
215 ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
217 if (!pCursor->nOffset)
219 ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph);
221 if (prev->type == diRun)
224 if (editor->bCaretAtEnd && !pCursor->nOffset &&
225 run == ME_FindItemFwd(row, diRun))
227 ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
229 if (tmp->type == diRun)
231 row = ME_FindItemBack(tmp, diStartRow);
232 pSizeRun = run = tmp;
234 assert(run->type == diRun);
235 sz = ME_GetRunSize(&c, ¶->member.para,
236 &run->member.run, run->member.run.strText->nLen,
237 row->member.row.nLMargin);
240 if (pCursor->nOffset) {
241 sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run,
242 pCursor->nOffset, row->member.row.nLMargin);
245 *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
246 *x = c.rcView.left + run->member.run.pt.x + sz.cx - editor->horz_si.nPos;
247 *y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline
248 + run->member.run.pt.y - pSizeRun->member.run.nAscent
249 - editor->vert_si.nPos;
250 ME_DestroyContext(&c);
256 ME_MoveCaret(ME_TextEditor *editor)
260 ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
261 if(editor->bHaveFocus && !ME_IsSelection(editor))
263 x = min(x, editor->rcFormat.right-1);
264 ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height);
265 ITextHost_TxSetCaretPos(editor->texthost, x, y);
270 void ME_ShowCaret(ME_TextEditor *ed)
273 if(ed->bHaveFocus && !ME_IsSelection(ed))
274 ITextHost_TxShowCaret(ed->texthost, TRUE);
277 void ME_HideCaret(ME_TextEditor *ed)
279 if(!ed->bHaveFocus || ME_IsSelection(ed))
281 ITextHost_TxShowCaret(ed->texthost, FALSE);
286 BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start,
287 int nChars, BOOL bForce)
289 ME_Cursor c = *start;
290 int nOfs = ME_GetCursorOfs(start);
292 int totalChars = nChars;
293 ME_DisplayItem *start_para;
295 /* Prevent deletion past last end of paragraph run. */
296 nChars = min(nChars, ME_GetTextLength(editor) - nOfs);
297 start_para = c.pPara;
301 ME_ProtectPartialTableDeletion(editor, &c, &nChars);
309 ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
311 nOfs+nChars == (c.pRun->member.run.nCharOfs
312 + c.pPara->member.para.nCharOfs))
314 /* We aren't deleting anything in this run, so we will go back to the
315 * last run we are deleting text in. */
316 ME_PrevRun(&c.pPara, &c.pRun);
317 c.nOffset = c.pRun->member.run.strText->nLen;
319 run = &c.pRun->member.run;
320 if (run->nFlags & MERF_ENDPARA) {
321 int eollen = c.pRun->member.run.strText->nLen;
322 BOOL keepFirstParaFormat;
324 if (!ME_FindItemFwd(c.pRun, diParagraph))
328 keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
330 if (!editor->bEmulateVersion10) /* v4.1 */
332 ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
333 ME_DisplayItem *this_para = next_para->member.para.prev_para;
335 /* The end of paragraph before a table row is only deleted if there
336 * is nothing else on the line before it. */
337 if (this_para == start_para &&
338 next_para->member.para.nFlags & MEPF_ROWSTART)
340 /* If the paragraph will be empty, then it should be deleted, however
341 * it still might have text right now which would inherit the
342 * MEPF_STARTROW property if we joined it right now.
343 * Instead we will delete it after the preceding text is deleted. */
344 if (nOfs > this_para->member.para.nCharOfs) {
345 /* Skip this end of line. */
346 nChars -= (eollen < nChars) ? eollen : nChars;
349 keepFirstParaFormat = TRUE;
352 ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat);
353 /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
354 ME_CheckCharOffsets(editor);
355 nChars -= (eollen < nChars) ? eollen : nChars;
361 int nCharsToDelete = min(nChars, c.nOffset);
364 c.nOffset -= nCharsToDelete;
366 ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
369 /* nChars is the number of characters that should be deleted from the
370 PRECEDING runs (these BEFORE cursor.pRun)
371 nCharsToDelete is a number of chars to delete from THIS run */
372 nChars -= nCharsToDelete;
373 shift -= nCharsToDelete;
374 TRACE("Deleting %d (remaning %d) chars at %d in '%s' (%d)\n",
375 nCharsToDelete, nChars, c.nOffset,
376 debugstr_w(run->strText->szData), run->strText->nLen);
378 if (!c.nOffset && run->strText->nLen == nCharsToDelete)
380 /* undo = reinsert whole run */
381 /* nOfs is a character offset (from the start of the document
382 to the current (deleted) run */
383 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
385 pUndo->di.member.run.nCharOfs = nOfs+nChars;
389 /* undo = reinsert partial run */
390 ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
392 ME_DestroyString(pUndo->di.member.run.strText);
393 pUndo->di.member.run.nCharOfs = nOfs+nChars;
394 pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
397 TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
398 TRACE("Shift value: %d\n", shift);
399 ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
401 /* update cursors (including c) */
402 for (i=-1; i<editor->nCursors; i++) {
403 ME_Cursor *pThisCur = editor->pCursors + i;
404 if (i == -1) pThisCur = &c;
405 if (pThisCur->pRun == cursor.pRun) {
406 if (pThisCur->nOffset > cursor.nOffset) {
407 if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
408 pThisCur->nOffset = cursor.nOffset;
410 pThisCur->nOffset -= nCharsToDelete;
411 assert(pThisCur->nOffset >= 0);
412 assert(pThisCur->nOffset <= run->strText->nLen);
414 if (pThisCur->nOffset == run->strText->nLen)
416 pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
417 assert(pThisCur->pRun->type == diRun);
418 pThisCur->nOffset = 0;
423 /* c = updated data now */
425 if (c.pRun == cursor.pRun)
426 ME_SkipAndPropagateCharOffset(c.pRun, shift);
428 ME_PropagateCharOffset(c.pRun, shift);
430 if (!cursor.pRun->member.run.strText->nLen)
432 TRACE("Removing useless run\n");
433 ME_Remove(cursor.pRun);
434 ME_DestroyDisplayItem(cursor.pRun);
439 ME_CheckCharOffsets(editor);
447 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
449 assert(nCursor>=0 && nCursor<editor->nCursors);
450 /* text operations set modified state */
451 editor->nModifyStep = 1;
452 return ME_InternalDeleteText(editor, &editor->pCursors[nCursor],
456 static ME_DisplayItem *
457 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
458 const WCHAR *str, int len, ME_Style *style,
461 ME_Cursor *p = &editor->pCursors[nCursor];
463 editor->bCaretAtEnd = FALSE;
465 assert(p->pRun->type == diRun);
467 return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
471 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
473 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
478 if (ME_IsSelection(editor))
479 ME_DeleteSelection(editor);
481 di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
483 di->member.run.ole_obj = ALLOC_OBJ(*reo);
484 ME_CopyReObject(di->member.run.ole_obj, reo);
485 ME_ReleaseStyle(pStyle);
489 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor)
491 ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
495 if (ME_IsSelection(editor))
496 ME_DeleteSelection(editor);
498 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
500 ME_ReleaseStyle(pStyle);
504 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
505 const WCHAR *str, int len, ME_Style *style)
511 /* FIXME really HERE ? */
512 if (ME_IsSelection(editor))
513 ME_DeleteSelection(editor);
515 /* FIXME: is this too slow? */
516 /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
517 oldLen = ME_GetTextLength(editor);
519 /* text operations set modified state */
520 editor->nModifyStep = 1;
524 assert(nCursor>=0 && nCursor<editor->nCursors);
528 /* grow the text limit to fit our text */
529 if(editor->nTextLimit < oldLen +len)
530 editor->nTextLimit = oldLen + len;
536 /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
537 while(pos - str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
540 if (pos != str) { /* handle text */
541 ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
542 } else if (*pos == '\t') { /* handle tabs */
544 ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
546 } else { /* handle EOLs */
547 ME_DisplayItem *tp, *end_run;
551 /* Find number of CR and LF in end of paragraph run */
554 if (len > 1 && pos[1] == '\n')
556 else if (len > 2 && pos[1] == '\r' && pos[2] == '\n')
561 assert(*pos == '\n');
566 if (!editor->bEmulateVersion10 && eol_len == 3)
568 /* handle special \r\r\n sequence (richedit 2.x and higher only) */
570 ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
574 if (!editor->bEmulateVersion10) {
576 eol_str = ME_MakeStringN(&cr, 1);
578 eol_str = ME_MakeStringN(str, eol_len);
581 p = &editor->pCursors[nCursor];
583 ME_SplitRunSimple(editor, p);
584 tmp_style = ME_GetInsertStyle(editor, nCursor);
585 /* ME_SplitParagraph increases style refcount */
586 tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, eol_str, 0);
587 p->pRun = ME_FindItemFwd(tp, diRun);
589 end_run = ME_FindItemBack(tp, diRun);
590 ME_ReleaseStyle(end_run->member.run.style);
591 end_run->member.run.style = tmp_style;
600 /* Move the cursor nRelOfs characters (either forwards or backwards)
602 * returns the actual number of characters moved.
604 int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
606 cursor->nOffset += nRelOfs;
607 if (cursor->nOffset < 0)
609 cursor->nOffset += cursor->pRun->member.run.nCharOfs;
610 if (cursor->nOffset >= 0)
612 /* new offset in the same paragraph */
614 cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
615 } while (cursor->nOffset < cursor->pRun->member.run.nCharOfs);
616 cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
620 cursor->nOffset += cursor->pPara->member.para.nCharOfs;
621 if (cursor->nOffset <= 0)
623 /* moved to the start of the text */
624 nRelOfs -= cursor->nOffset;
625 ME_SetCursorToStart(editor, cursor);
629 /* new offset in a previous paragraph */
631 cursor->pPara = cursor->pPara->member.para.prev_para;
632 } while (cursor->nOffset < cursor->pPara->member.para.nCharOfs);
633 cursor->nOffset -= cursor->pPara->member.para.nCharOfs;
635 cursor->pRun = ME_FindItemBack(cursor->pPara->member.para.next_para, diRun);
636 while (cursor->nOffset < cursor->pRun->member.run.nCharOfs) {
637 cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
639 cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
640 } else if (cursor->nOffset >= cursor->pRun->member.run.strText->nLen) {
641 ME_DisplayItem *next_para;
644 new_offset = ME_GetCursorOfs(cursor);
645 next_para = cursor->pPara->member.para.next_para;
646 if (new_offset < next_para->member.para.nCharOfs)
648 /* new offset in the same paragraph */
650 cursor->nOffset -= cursor->pRun->member.run.strText->nLen;
651 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
652 } while (cursor->nOffset >= cursor->pRun->member.run.strText->nLen);
656 if (new_offset >= ME_GetTextLength(editor))
658 /* new offset at the end of the text */
659 ME_SetCursorToEnd(editor, cursor);
660 nRelOfs -= new_offset - ME_GetTextLength(editor);
664 /* new offset in a following paragraph */
666 cursor->pPara = next_para;
667 next_para = next_para->member.para.next_para;
668 } while (new_offset >= next_para->member.para.nCharOfs);
670 cursor->nOffset = new_offset - cursor->pPara->member.para.nCharOfs;
671 cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
672 while (cursor->nOffset >= cursor->pRun->member.run.strText->nLen)
674 cursor->nOffset -= cursor->pRun->member.run.strText->nLen;
675 cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
677 } /* else new offset is in the same run */
683 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
685 ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
686 ME_DisplayItem *pPara = cursor->pPara;
687 int nOffset = cursor->nOffset;
691 /* Backward movement */
694 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
695 nOffset, WB_MOVEWORDLEFT);
698 pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
699 if (pOtherRun->type == diRun)
701 if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
702 pOtherRun->member.run.strText->nLen - 1,
704 && !(pRun->member.run.nFlags & MERF_ENDPARA)
705 && !(cursor->pRun == pRun && cursor->nOffset == 0)
706 && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
710 nOffset = pOtherRun->member.run.strText->nLen;
712 else if (pOtherRun->type == diParagraph)
714 if (cursor->pRun == pRun && cursor->nOffset == 0)
717 /* Skip empty start of table row paragraph */
718 if (pPara->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
719 pPara = pPara->member.para.prev_para;
720 /* Paragraph breaks are treated as separate words */
721 if (pPara->member.para.prev_para->type == diTextStart)
724 pRun = ME_FindItemBack(pPara, diRun);
725 pPara = pPara->member.para.prev_para;
733 /* Forward movement */
734 BOOL last_delim = FALSE;
738 if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
739 nOffset, WB_ISDELIMITER))
741 nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
742 nOffset, WB_MOVEWORDRIGHT);
743 if (nOffset < pRun->member.run.strText->nLen)
745 pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
746 if (pOtherRun->type == diRun)
748 last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
749 nOffset - 1, WB_ISDELIMITER);
753 else if (pOtherRun->type == diParagraph)
755 if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
756 pOtherRun = pOtherRun->member.para.next_para;
757 if (cursor->pRun == pRun) {
759 pRun = ME_FindItemFwd(pPara, diRun);
766 if (cursor->pRun == pRun)
773 cursor->pPara = pPara;
775 cursor->nOffset = nOffset;
781 ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
783 /* pCursor[0] is the end of the selection
784 * pCursor[1] is the start of the selection (or the position selection anchor)
785 * pCursor[2] and [3] are the selection anchors that are backed up
786 * so they are kept when the selection changes for drag selection.
789 editor->nSelectionType = selectionType;
790 switch(selectionType)
795 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
796 editor->pCursors[1] = editor->pCursors[0];
797 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
802 ME_DisplayItem *pItem;
803 ME_DIType fwdSearchType, backSearchType;
804 if (selectionType == stParagraph) {
805 backSearchType = diParagraph;
806 fwdSearchType = diParagraphOrEnd;
808 backSearchType = diStartRow;
809 fwdSearchType = diStartRowOrParagraphOrEnd;
811 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
813 if (pItem->type == diTextEnd)
814 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
816 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
817 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
818 editor->pCursors[0].nOffset = 0;
820 pItem = ME_FindItemBack(pItem, backSearchType);
821 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
822 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
823 editor->pCursors[1].nOffset = 0;
827 /* Select everything with cursor anchored from the start of the text */
828 editor->nSelectionType = stDocument;
829 ME_SetCursorToStart(editor, &editor->pCursors[1]);
830 ME_SetCursorToEnd(editor, &editor->pCursors[0]);
834 /* Store the anchor positions for extending the selection. */
835 editor->pCursors[2] = editor->pCursors[0];
836 editor->pCursors[3] = editor->pCursors[1];
839 int ME_GetCursorOfs(const ME_Cursor *cursor)
841 return cursor->pPara->member.para.nCharOfs
842 + cursor->pRun->member.run.nCharOfs + cursor->nOffset;
845 /* Helper function for ME_FindPixelPos to find paragraph within tables */
846 static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
847 ME_DisplayItem *para)
849 ME_DisplayItem *cell, *next_cell;
850 assert(para->member.para.nFlags & MEPF_ROWSTART);
851 cell = para->member.para.next_para->member.para.pCell;
854 /* find the cell we are in */
855 while ((next_cell = cell->member.cell.next_cell) != NULL) {
856 if (x < next_cell->member.cell.pt.x)
858 para = ME_FindItemFwd(cell, diParagraph);
859 /* Found the cell, but there might be multiple paragraphs in
860 * the cell, so need to search down the cell for the paragraph. */
861 while (cell == para->member.para.pCell) {
862 if (y < para->member.para.pt.y + para->member.para.nHeight)
864 if (para->member.para.nFlags & MEPF_ROWSTART)
865 return ME_FindPixelPosInTableRow(x, y, para);
869 para = para->member.para.next_para;
871 /* Past the end of the cell, so go back to the last cell paragraph */
872 return para->member.para.prev_para;
876 /* Return table row delimiter */
877 para = ME_FindItemFwd(cell, diParagraph);
878 assert(para->member.para.nFlags & MEPF_ROWEND);
879 assert(para->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
880 assert(para->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
884 static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found,
885 ME_Cursor *result, int rx, BOOL isExact)
888 assert(found->type == diRun);
889 if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0)
891 result->pRun = found;
892 result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run);
893 if (result->nOffset == found->member.run.strText->nLen && rx)
895 result->pRun = ME_FindItemFwd(result->pRun, diRun);
898 result->pPara = ME_GetParagraph(result->pRun);
902 /* Finds the run and offset from the pixel position.
904 * x & y are pixel positions in virtual coordinates into the rich edit control,
905 * so client coordinates must first be adjusted by the scroll position.
907 * returns TRUE if the result was exactly under the cursor, otherwise returns
908 * FALSE, and result is set to the closest position to the coordinates.
910 static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
911 ME_Cursor *result, BOOL *is_eol)
913 ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
914 ME_DisplayItem *last = NULL;
918 x -= editor->rcFormat.left;
919 y -= editor->rcFormat.top;
925 for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
927 assert(p->type == diParagraph);
928 if (y < p->member.para.pt.y + p->member.para.nHeight)
930 if (p->member.para.nFlags & MEPF_ROWSTART)
931 p = ME_FindPixelPosInTableRow(x, y, p);
932 y -= p->member.para.pt.y;
933 p = ME_FindItemFwd(p, diStartRow);
935 } else if (p->member.para.nFlags & MEPF_ROWSTART) {
936 p = ME_GetTableRowEnd(p);
940 for (; p != editor->pBuffer->pLast; )
943 assert(p->type == diStartRow);
944 if (y < p->member.row.pt.y + p->member.row.nHeight)
946 p = ME_FindItemFwd(p, diRun);
949 pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
950 if (pp->type != diStartRow)
952 p = ME_FindItemFwd(p, diRun);
957 if (p == editor->pBuffer->pLast)
959 /* The position is below the last paragraph, so the last row will be used
960 * rather than the end of the text, so the x position will be used to
961 * determine the offset closest to the pixel position. */
963 p = ME_FindItemBack(p, diStartRow);
965 p = ME_FindItemFwd(p, diRun);
969 p = editor->pBuffer->pLast;
972 for (; p != editor->pBuffer->pLast; p = p->next)
977 rx = x - p->member.run.pt.x;
978 if (rx < p->member.run.nWidth)
979 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
983 p = ME_FindItemFwd(p, diRun);
984 if (is_eol) *is_eol = 1;
985 rx = 0; /* FIXME not sure */
986 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
991 rx = 0; /* FIXME not sure */
993 return ME_ReturnFoundPos(editor, p, result, rx, isExact);
998 result->pRun = ME_FindItemBack(p, diRun);
999 result->pPara = ME_GetParagraph(result->pRun);
1000 result->nOffset = 0;
1001 assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
1006 /* Sets the cursor to the position closest to the pixel position
1008 * x & y are pixel positions in client coordinates.
1010 * isExact will be set to TRUE if the run is directly under the pixel
1011 * position, FALSE if it not, unless isExact is set to NULL.
1013 * return FALSE if outside client area and the cursor is not set,
1014 * otherwise TRUE is returned.
1016 BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y,
1017 ME_Cursor *cursor, BOOL *isExact)
1022 ITextHost_TxGetClientRect(editor->texthost, &rc);
1023 if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
1024 if (isExact) *isExact = FALSE;
1027 x += editor->horz_si.nPos;
1028 y += editor->vert_si.nPos;
1029 bResult = ME_FindPixelPos(editor, x, y, cursor, NULL);
1030 if (isExact) *isExact = bResult;
1036 /* Extends the selection with a word, line, or paragraph selection type.
1038 * The selection is anchored by editor->pCursors[2-3] such that the text
1039 * between the anchors will remain selected, and one end will be extended.
1041 * editor->pCursors[0] should have the position to extend the selection to
1042 * before this function is called.
1044 * Nothing will be done if editor->nSelectionType equals stPosition.
1046 static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
1048 ME_Cursor tmp_cursor;
1049 int curOfs, anchorStartOfs, anchorEndOfs;
1050 if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
1052 curOfs = ME_GetCursorOfs(&editor->pCursors[0]);
1053 anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]);
1054 anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]);
1056 tmp_cursor = editor->pCursors[0];
1057 editor->pCursors[0] = editor->pCursors[2];
1058 editor->pCursors[1] = editor->pCursors[3];
1059 if (curOfs < anchorStartOfs)
1061 /* Extend the left side of selection */
1062 editor->pCursors[1] = tmp_cursor;
1063 if (editor->nSelectionType == stWord)
1064 ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
1067 ME_DisplayItem *pItem;
1068 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1069 diStartRowOrParagraph:diParagraph);
1070 pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
1071 editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
1072 editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
1073 editor->pCursors[1].nOffset = 0;
1076 else if (curOfs >= anchorEndOfs)
1078 /* Extend the right side of selection */
1079 editor->pCursors[0] = tmp_cursor;
1080 if (editor->nSelectionType == stWord)
1081 ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
1084 ME_DisplayItem *pItem;
1085 ME_DIType searchType = ((editor->nSelectionType == stLine) ?
1086 diStartRowOrParagraphOrEnd:diParagraphOrEnd);
1087 pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
1088 if (pItem->type == diTextEnd)
1089 editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
1091 editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
1092 editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
1093 editor->pCursors[0].nOffset = 0;
1098 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
1100 ME_Cursor tmp_cursor;
1101 int is_selection = 0;
1104 editor->nUDArrowX = -1;
1106 x += editor->horz_si.nPos;
1107 y += editor->vert_si.nPos;
1109 tmp_cursor = editor->pCursors[0];
1110 is_selection = ME_IsSelection(editor);
1111 is_shift = GetKeyState(VK_SHIFT) < 0;
1113 ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
1115 if (x >= editor->rcFormat.left || is_shift)
1119 editor->pCursors[1] = editor->pCursors[0];
1121 if (x >= editor->rcFormat.left)
1122 ME_SelectByType(editor, stWord);
1124 ME_SelectByType(editor, stParagraph);
1125 } else if (clickNum % 2 == 0) {
1126 ME_SelectByType(editor, stWord);
1128 ME_SelectByType(editor, stParagraph);
1133 editor->nSelectionType = stPosition;
1134 editor->pCursors[1] = editor->pCursors[0];
1136 else if (!is_selection)
1138 editor->nSelectionType = stPosition;
1139 editor->pCursors[1] = tmp_cursor;
1141 else if (editor->nSelectionType != stPosition)
1143 ME_ExtendAnchorSelection(editor);
1149 ME_SelectByType(editor, stLine);
1150 } else if (clickNum % 2 == 0 || is_shift) {
1151 ME_SelectByType(editor, stParagraph);
1153 ME_SelectByType(editor, stDocument);
1156 ME_InvalidateSelection(editor);
1157 ITextHost_TxShowCaret(editor->texthost, FALSE);
1158 ME_ShowCaret(editor);
1159 ME_ClearTempStyle(editor);
1160 ME_SendSelChange(editor);
1163 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
1165 ME_Cursor tmp_cursor;
1167 if (editor->nSelectionType == stDocument)
1169 x += editor->horz_si.nPos;
1170 y += editor->vert_si.nPos;
1172 tmp_cursor = editor->pCursors[0];
1173 /* FIXME: do something with the return value of ME_FindPixelPos */
1174 ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
1176 ME_InvalidateSelection(editor);
1177 editor->pCursors[0] = tmp_cursor;
1178 ME_ExtendAnchorSelection(editor);
1180 if (editor->nSelectionType != stPosition &&
1181 memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
1183 /* The scroll the cursor towards the other end, since it was the one
1184 * extended by ME_ExtendAnchorSelection */
1185 ME_EnsureVisible(editor, &editor->pCursors[1]);
1187 ME_EnsureVisible(editor, &editor->pCursors[0]);
1190 ME_InvalidateSelection(editor);
1191 ITextHost_TxShowCaret(editor->texthost, FALSE);
1192 ME_ShowCaret(editor);
1193 ME_SendSelChange(editor);
1196 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
1197 int x, int *pOffset, int *pbCaretAtEnd)
1199 ME_DisplayItem *pNext, *pLastRun;
1200 pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
1201 assert(pNext->type == diRun);
1202 if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
1203 if (pOffset) *pOffset = 0;
1205 int run_x = pNext->member.run.pt.x;
1206 int width = pNext->member.run.nWidth;
1211 if (x >= run_x && x < run_x+width)
1213 int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
1214 ME_String *s = pNext->member.run.strText;
1222 pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
1223 } while(pNext && pNext->type == diRun);
1225 if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
1227 pNext = ME_FindItemFwd(pNext, diRun);
1228 if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
1235 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
1237 ME_DisplayItem *pRun = pCursor->pRun;
1240 if (editor->nUDArrowX != -1)
1241 x = editor->nUDArrowX;
1243 if (editor->bCaretAtEnd)
1245 pRun = ME_FindItemBack(pRun, diRun);
1247 x = pRun->member.run.pt.x + pRun->member.run.nWidth;
1250 x = pRun->member.run.pt.x;
1251 x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
1253 editor->nUDArrowX = x;
1260 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
1262 ME_DisplayItem *pRun = pCursor->pRun;
1263 ME_DisplayItem *pOldPara = pCursor->pPara;
1264 ME_DisplayItem *pItem, *pNewPara;
1265 int x = ME_GetXForArrow(editor, pCursor);
1267 if (editor->bCaretAtEnd && !pCursor->nOffset)
1268 if (!ME_PrevRun(&pOldPara, &pRun))
1273 /* start of this row */
1274 pItem = ME_FindItemBack(pRun, diStartRow);
1276 /* start of the previous row */
1277 pItem = ME_FindItemBack(pItem, diStartRow);
1279 return; /* row not found - ignore */
1280 pNewPara = ME_GetParagraph(pItem);
1281 if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
1282 (pOldPara->member.para.pCell &&
1283 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1285 /* Brought out of a cell */
1286 pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
1287 if (pNewPara->type == diTextStart)
1288 return; /* At the top, so don't go anywhere. */
1289 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1291 if (pNewPara->member.para.nFlags & MEPF_ROWEND)
1293 /* Brought into a table row */
1294 ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
1295 while (x < cell->pt.x && cell->prev_cell)
1296 cell = &cell->prev_cell->member.cell;
1297 if (cell->next_cell) /* else - we are still at the end of the row */
1298 pItem = ME_FindItemBack(cell->next_cell, diStartRow);
1303 /* start of the next row */
1304 pItem = ME_FindItemFwd(pRun, diStartRow);
1306 return; /* row not found - ignore */
1307 pNewPara = ME_GetParagraph(pItem);
1308 if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
1309 (pOldPara->member.para.pCell &&
1310 pOldPara->member.para.pCell != pNewPara->member.para.pCell))
1312 /* Brought out of a cell */
1313 pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
1314 if (pNewPara->type == diTextEnd)
1315 return; /* At the bottom, so don't go anywhere. */
1316 pItem = ME_FindItemFwd(pNewPara, diStartRow);
1318 if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
1320 /* Brought into a table row */
1321 ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
1322 while (cell->member.cell.next_cell &&
1323 x >= cell->member.cell.next_cell->member.cell.pt.x)
1324 cell = cell->member.cell.next_cell;
1325 pItem = ME_FindItemFwd(cell, diStartRow);
1330 /* row not found - ignore */
1333 pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1334 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1335 assert(pCursor->pRun);
1336 assert(pCursor->pRun->type == diRun);
1339 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
1341 ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
1343 if (editor->vert_si.nPos < p->member.row.nHeight)
1345 ME_SetCursorToStart(editor, pCursor);
1346 editor->bCaretAtEnd = FALSE;
1347 /* Native clears seems to clear this x value on page up at the top
1348 * of the text, but not on page down at the end of the text.
1349 * Doesn't make sense, but we try to be bug for bug compatible. */
1350 editor->nUDArrowX = -1;
1352 ME_DisplayItem *pRun = pCursor->pRun;
1353 ME_DisplayItem *pLast;
1355 int yOldScrollPos = editor->vert_si.nPos;
1357 x = ME_GetXForArrow(editor, pCursor);
1358 if (!pCursor->nOffset && editor->bCaretAtEnd)
1359 pRun = ME_FindItemBack(pRun, diRun);
1361 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1362 assert(p->type == diStartRow);
1363 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1364 y = yp + p->member.row.pt.y;
1366 ME_ScrollUp(editor, editor->sizeWindow.cy);
1367 /* Only move the cursor by the amount scrolled. */
1368 yd = y + editor->vert_si.nPos - yOldScrollPos;
1372 p = ME_FindItemBack(p, diStartRowOrParagraph);
1375 if (p->type == diParagraph) { /* crossing paragraphs */
1376 if (p->member.para.prev_para == NULL)
1378 yp = p->member.para.prev_para->member.para.pt.y;
1381 y = yp + p->member.row.pt.y;
1387 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1388 &editor->bCaretAtEnd);
1389 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1391 assert(pCursor->pRun);
1392 assert(pCursor->pRun->type == diRun);
1395 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1397 ME_DisplayItem *pLast;
1400 /* Find y position of the last row */
1401 pLast = editor->pBuffer->pLast;
1402 y = pLast->member.para.prev_para->member.para.pt.y
1403 + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
1405 x = ME_GetXForArrow(editor, pCursor);
1407 if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
1409 ME_SetCursorToEnd(editor, pCursor);
1410 editor->bCaretAtEnd = FALSE;
1412 ME_DisplayItem *pRun = pCursor->pRun;
1415 int yOldScrollPos = editor->vert_si.nPos;
1417 if (!pCursor->nOffset && editor->bCaretAtEnd)
1418 pRun = ME_FindItemBack(pRun, diRun);
1420 p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1421 assert(p->type == diStartRow);
1422 yp = ME_FindItemBack(p, diParagraph)->member.para.pt.y;
1423 y = yp + p->member.row.pt.y;
1425 /* For native richedit controls:
1426 * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
1427 * v4.1 can scroll past this position here. */
1428 ME_ScrollDown(editor, editor->sizeWindow.cy);
1429 /* Only move the cursor by the amount scrolled. */
1430 yd = y + editor->vert_si.nPos - yOldScrollPos;
1434 p = ME_FindItemFwd(p, diStartRowOrParagraph);
1437 if (p->type == diParagraph) {
1438 yp = p->member.para.pt.y;
1441 y = yp + p->member.row.pt.y;
1447 pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
1448 &editor->bCaretAtEnd);
1449 pCursor->pPara = ME_GetParagraph(pCursor->pRun);
1451 assert(pCursor->pRun);
1452 assert(pCursor->pRun->type == diRun);
1455 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1457 ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1459 ME_DisplayItem *pRun;
1460 if (editor->bCaretAtEnd && !pCursor->nOffset) {
1461 pRow = ME_FindItemBack(pRow, diStartRow);
1465 pRun = ME_FindItemFwd(pRow, diRun);
1467 pCursor->pRun = pRun;
1468 assert(pCursor->pPara == ME_GetParagraph(pRun));
1469 pCursor->nOffset = 0;
1472 editor->bCaretAtEnd = FALSE;
1475 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1477 ME_SetCursorToStart(editor, pCursor);
1478 editor->bCaretAtEnd = FALSE;
1481 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1483 ME_DisplayItem *pRow;
1485 if (editor->bCaretAtEnd && !pCursor->nOffset)
1488 pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1490 if (pRow->type == diStartRow) {
1491 ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1493 pCursor->pRun = pRun;
1494 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1495 pCursor->nOffset = 0;
1496 editor->bCaretAtEnd = TRUE;
1499 pCursor->pRun = ME_FindItemBack(pRow, diRun);
1500 assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1501 assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
1502 pCursor->nOffset = 0;
1503 editor->bCaretAtEnd = FALSE;
1506 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1508 ME_SetCursorToEnd(editor, pCursor);
1509 editor->bCaretAtEnd = FALSE;
1512 BOOL ME_IsSelection(ME_TextEditor *editor)
1514 return editor->pCursors[0].pRun != editor->pCursors[1].pRun ||
1515 editor->pCursors[0].nOffset != editor->pCursors[1].nOffset;
1518 void ME_DeleteSelection(ME_TextEditor *editor)
1521 int nStartCursor = ME_GetSelectionOfs(editor, &from, &to);
1522 ME_DeleteTextAtCursor(editor, nStartCursor, to - from);
1525 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1527 return ME_GetInsertStyle(editor, 0);
1530 void ME_SendSelChange(ME_TextEditor *editor)
1534 if (!(editor->nEventMask & ENM_SELCHANGE))
1537 sc.nmhdr.hwndFrom = NULL;
1538 sc.nmhdr.idFrom = 0;
1539 sc.nmhdr.code = EN_SELCHANGE;
1540 ME_GetSelectionOfs(editor, &sc.chrg.cpMin, &sc.chrg.cpMax);
1541 sc.seltyp = SEL_EMPTY;
1542 if (sc.chrg.cpMin != sc.chrg.cpMax)
1543 sc.seltyp |= SEL_TEXT;
1544 if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* what were RICHEDIT authors thinking ? */
1545 sc.seltyp |= SEL_MULTICHAR;
1546 TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
1547 sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
1548 (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
1549 (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
1550 if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
1552 ME_ClearTempStyle(editor);
1554 editor->notified_cr = sc.chrg;
1555 ITextHost_TxNotify(editor->texthost, sc.nmhdr.code, &sc);
1560 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1563 ME_Cursor *p = &editor->pCursors[nCursor];
1564 ME_Cursor tmp_curs = *p;
1565 BOOL success = FALSE;
1567 ME_CheckCharOffsets(editor);
1570 editor->bCaretAtEnd = 0;
1572 success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1574 success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1577 editor->bCaretAtEnd = 0;
1579 success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1581 success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1584 ME_MoveCursorLines(editor, &tmp_curs, -1);
1587 ME_MoveCursorLines(editor, &tmp_curs, +1);
1590 ME_ArrowPageUp(editor, &tmp_curs);
1593 ME_ArrowPageDown(editor, &tmp_curs);
1597 ME_ArrowCtrlHome(editor, &tmp_curs);
1599 ME_ArrowHome(editor, &tmp_curs);
1600 editor->bCaretAtEnd = 0;
1605 ME_ArrowCtrlEnd(editor, &tmp_curs);
1607 ME_ArrowEnd(editor, &tmp_curs);
1612 editor->pCursors[1] = tmp_curs;
1615 ME_InvalidateSelection(editor);
1617 ITextHost_TxShowCaret(editor->texthost, FALSE);
1618 ME_EnsureVisible(editor, &tmp_curs);
1619 ME_ShowCaret(editor);
1620 ME_SendSelChange(editor);